Although we are talking about a very cheap device, unfortunately it is not worth even those 8 euros. You understand how low-quality Chinese manufacturing it is as soon as you hold it in your hands.
After 5-6 uses in 2 months, it stopped working when I put on the head that appears worn in the photo, which is also the most important one. And it doesn't fix with cleaning/lubrication.
I hope to sort it out with the warranty, although even if they give me a new device, the product is garbage.